The Levi's inner tag indicates "11 4 6," meaning it was manufactured in November 1974 at factory number 6. Levi's 66 early model (W35 x L34) manufactured in November 1974 at factory number 6 is a popular specification among vintage denim enthusiasts. Models from this period are known for their beautiful vertical fading, making them highly sought after by collectors. This suggests a high probability of it being an early 66 model (circa 1973-1976). How to read the code: The numbers in the lower right of the inner tag generally follow the format "Month Year (last digit) Factory Number," so "11 4 6" indicates November, 1974, and factory number 6. Factory 6 is a representative factory for the 66 model and is the predecessor to the El Paso factory (later factory 524). Confirmation of early 66 model features: • Back pocket lining: Single stitch (later models have chain stitch) • Paper patch: Black stamp "CARE INSTRUCTIONS" • Top button back: 6 stamp (matches) This tag confirms it's a genuine vintage early 66 model, a masterpiece with attractive vertical fading. Waist: 42.5 x 2 = 85cm Rise: 30cm Thigh: 26.5 cm Inseam: 77.5 cm Hem: 20 cm